Help: Consolidate 3.6 release notes

Move all development release notes into a new version-specific document:

 tail -q -n +3 Help/release/dev/* > Help/release/3.6.rst
 git rm -- Help/release/dev/*

except the sample topic:

 git checkout HEAD -- Help/release/dev/0-sample-topic.rst

Reference the new document from the release notes index document.
Add a title and intro sentence to the new document by hand.

1 files changed, 0 insertions, 12 deletions

diff --git a/Help/release/dev/find-command-prefix-from-PATH-windows-only.rst b/Help/release/dev/find-command-prefix-from-PATH-windows-only.rst
deleted file mode 100644
index be6eb3e..0000000
--- a/Help/release/dev/find-command-prefix-from-PATH-windows-only.rst
+++ /dev/null
@@ -1,12 +0,0 @@
-find-command-prefix-from-PATH-windows-only
-------------------------------------------
-
-* The :command:`find_library`, :command:`find_path`, and :command:`find_file`
-  commands no longer search in installation prefixes derived from the ``PATH``
-  environment variable on non-Windows platforms.  This behavior was added in
-  CMake 3.3 to support Windows hosts but has proven problematic on UNIX hosts.
-  Users that keep some ``<prefix>/bin`` directories in the ``PATH`` just for
-  their tools do not necessarily want any supporting ``<prefix>/lib``
-  directories searched.  One may set the ``CMAKE_PREFIX_PATH`` environment
-  variable with a :ref:`;-list <CMake Language Lists>` of prefixes that are
-  to be searched.